Method of controlling oil pump of vehicle

A method of controlling an oil pump of a vehicle, the method comprising:

• acquiring, by a controller, information on an engine operating state or a driving condition detected by a driving information detection part;
• selecting, by the controller, a control mode satisfying a predetermined condition based on the acquired information on the engine operating state or the driving condition among a plurality of control modes for controlling an operation of an oil pump system;
• and
• controlling, by the controller, the operation of the oil pump system to control an oil pressure of an engine to a target value corresponding to the selected control mode among the plurality of control modes,
• wherein:
• the plurality of control modes include an alternate mode;
• when a predetermined condition of the alternate mode is satisfied, the alternate mode is selected;
• and
• in controlling the oil pump system, sequentially performing, by the controller, a high-pressure operation control that allows the oil pressure of the engine to converge on a predetermined target high-pressure value, and a low pressure operation control that allows the oil pressure of the engine to converge on a predetermined target low-pressure value.